Mobile coiled tubing reel unit, rig and arrangements thereof

Abstract

A system is provided for injecting coiled tubing (CT) into and out of a wellbore. In embodiments, separate injector and reel units are provided releasing constraints on CT size and length. The injector unit is fit with an extendible mast for handling larger bottom hole assemblies and fit with a rotating gooseneck for accepting CT from alternate arrangements of the reel unit. The mast is reinforced to resist CT loading. The capacity of the reel is maximized for the reel unit transport envelope. The reel is rotated using an offset drive engaging a bounding reel flange, such as engaging drive and bull gears. A generally radial displacement of the drive from the reel permits replacement of the entire reel.

The embodiments of the invention for which an exclusive property or privilege is claimed are as follows: 
     
       1. A system for conveying coiled tubing (CT) into and out of a wellbore comprising:
 a first mobile unit having 
 a first mobile frame having a drive end, a back end and a mast supported on the back end adjacent the wellbore, the mast pivotable between a transport position and an erect position; 
 a CT injector moveable along the mast; 
 a gooseneck; and 
 a rotatable support between the gooseneck and the injector; and 
 a second mobile unit having 
 a second mobile frame having a CT reel and a reel drive, wherein 
 when the second mobile unit is located at the drive end of the first mobile unit, the gooseneck is rotatable on the rotating support to the drive end to receive CT therefrom, and 
 when the second mobile unit is located at the back end of the first mobile unit, the gooseneck is rotatable on the rotating support to the back end to receive CT therefrom; and 
 the system further comprising a carriage for supporting the CT injector, and wherein 
 the mast further comprises a pair of parallel mast posts connected at the back end and at a crown; 
 the carriage being supported between the mast posts for moving the injector along the mast; and 
 wherein the gooseneck further comprises: 
 a proximal segment connected to the rotatable support, and 
 a distal segment connected to the proximal segment and pivotable between an extended position for forming an arcuate CT guide, and a folded position; and 
 when the gooseneck is in the folded position, the folded gooseneck has an effective turning radius that enables rotation between the drive end and back end; and 
 wherein the gooseneck further comprises: an actuator operative between the proximal and distal segments for manipulating the gooseneck between the extended and folded positions; and 
 wherein, at least when the gooseneck is in the folded position, the proximal segment is pivotable at a guide pivot at the rotating support for moving the effective turning radius of the folded gooseneck clear of the mast posts. 
 
     
     
       2. The system of  claim 1  wherein the gooseneck further comprises a fold lock between the proximal and distal segments for retaining the gooseneck in the folded position. 
     
     
       3. The system of  claim 2  wherein:
 the carriage further comprises an injector frame supporting the CT injector, the frame being movable away from and towards the mast, and 
 wherein the effective turning radius of the folded gooseneck is clear of the mast posts. 
 
     
     
       4. A system for conveying coiled tubing (CT) into and out of a wellbore comprising:
 a first mobile unit having 
 a first mobile frame having a drive end, a back end and a mast supported on the back end adjacent the wellbore, the mast pivotable between a transport position and an erect position; 
 a CT injector moveable along the mast; 
 a gooseneck; and 
 a rotatable support between the gooseneck and the injector; and 
 a second mobile unit having 
 a second mobile frame having a CT reel and a reel drive, wherein 
 when the second mobile unit is located at the drive end of the first mobile unit, the gooseneck is rotatable on the rotating support to the drive end to receive CT therefrom, and 
 when the second mobile unit is located at the back end of the first mobile unit, the gooseneck is rotatable on the rotating support to the back end to receive CT therefrom; and 
 the system further comprising a carriage for supporting the CT injector, and wherein the mast further comprises a pair of parallel mast posts connected at the back end and at a crown; 
 the carriage being supported between the mast posts for moving the injector along the mast; and 
 wherein the mast is extendible and wherein: 
 each mast post further comprising: 
 a first mast section pivotally connected to the back end; 
 a second mast section, and 
 an extension pivot, pivotally connecting the second mast section to the first mast section; and 
 the crown connecting the second mast sections of each mast post; and further comprising a releasable lock between each of the first and second mast sections, the releasable lock further comprising: 
 a latch pin connected to either the first or second mast section; 
 a lock claw pivotally actuated from the second or first mast section respectively and wherein when the mast is in the erect position, the lock claw is actuated to engage the latch pin for locking the first and second mast sections together. 
 
     
     
       5. A folding mast for a coiled tubing (CT) injector, the folding mast supported from a frame, comprising:
 a pair of parallel mast posts; 
 a carriage supported between the mast posts and adapted for moving the CT injector along the mast, 
 each mast post further comprising: 
 a first mast section for support from the frame, 
 a second mast section, and 
 an extension pivot, pivotally connecting the second mast section to the first mast section; and 
 a crown connecting the second mast sections of each mast post; and 
 further comprising a releasable lock between each of the first and second mast sections, each releasable lock further comprising: 
 a latch pin connected to either the first or second mast section; 
 a lock claw pivotally actuated from the second or first mast section respectively and wherein when the mast is in the erect position, the lock claw is actuated to engage the latch pin for locking the first and second mast sections together. 
 
     
     
       6. A folding mast for a coiled tubing (CT) injector, the folding mast supported from a frame, comprising:
 a pair of parallel mast posts; 
 a carriage supported between the mast posts and adapted for moving the CT injector along the mast, 
 each mast post further comprising: 
 a first mast section for support from the frame, 
 a second mast section, and 
 an extension pivot, pivotally connecting the second mast section to the first mast section; and 
 a crown connecting the second mast sections of each mast post; and wherein each extension pivot further comprises: 
 a generally triangular fulcrum having a three apexes, a first apex co-axial with the extension pivot; 
 a first actuator extending between the first mast section and a second apex, and 
 a second actuator extending between the second mast section and a third apex, wherein 
 when the first actuator is actuated to retract, the second mast section is caused to rotate about the extension pivot; and 
 when the second actuator is actuated to retract, the second mast section is caused to further rotate about the extension pivot until the mast is in the extended position. 
 
     
     
       7. A rotating gooseneck for a coiled tubing (CT) injector supported on a wellbore side of a mast, comprising:
 a rotatable support between the gooseneck and the CT injector; 
 a proximal segment of the gooseneck connected to the rotatable support, and 
 a distal segment connected to the proximal segment and pivotable between an extended position for forming an arcuate CT guide, and a folded position; and wherein 
 when the gooseneck is in the folded position, the folded gooseneck has an effective turning radius that enables rotation clear of the mast; and 
 wherein, at least when the gooseneck is in the folded position: 
 the proximal segment is pivotable at the rotating support for moving the effective turning radius of the folded gooseneck clear of the mast. 
 
     
     
       8. A rotating gooseneck for a coiled tubing (CT) injector supported on a wellbore side of a mast, comprising:
 a rotatable support between the gooseneck and the CT injector; 
 a proximal segment of the gooseneck connected to the rotatable support, and 
 a distal segment connected to the proximal segment and pivotable between an extended position for forming an arcuate CT guide, and a folded position; and wherein 
 when the gooseneck is in the folded position, the folded gooseneck has an effective turning radius that enables rotation clear of the mast; and 
 further comprising a fold lock between the proximal and distal segments for retaining the gooseneck in the folded position.